So old slicky here has been at it again, this time I have put together a custom air cleaner assembly for the guy running a 1949-51 Mercury, with a 4 barrel carburetor. The air cleaner is new, the Mercury hood ornament is used, was fully pitted, now sanded, with a zillion coats of red primer applied.  I drilled and tapped small holes into the wings that lay down on the air cleaner top lid, so now they are tight to the lid, but removable if desired. The air cleaner bottom lid/base is made for the common 5 1/8" four barrel carburetor (or Holley 350/400 two barrel).  The air filter element is the cotton gauge in a screen style, washable, applying a thin layer of ATF works the best, still washable.